Nobody saw it coming, and that includes Travis Frederick. When the five-time Pro Bowl center announced on Monday he'd be retiring from the NFL, the Dallas Cowboys were as thrown aback as they were respectful of his decision. After all, Frederick was able to defeat the odds and return to football just one year after being diagnosed with Guillain-Barre syndrome -- a condition that causes the body's antibodies to attack nerve cells. The illness can be fatal if not caught quickly and treated appropriately, so to see Frederick not only regain his health but to also return to football and then perform at a Pro Bowl level was a miraculous feat. SUBSCRIBE TO OUR CHANNEL: https://www.youtube.com/user/CBSSports FOLLOW US ON: Facebook - https://www.facebook.com/CBSSports/ Instagram - https://www.instagram.com/cbssports/ Twitter - https://twitter.com/CBSSports #NFL #Cowboys #TavisFrederick #Fotball #Dallas #DallasCOwboys